{ year 1990 }
{year 1991 { month jun }}
{ year 1992 { month jan ( 1 0 61.5) }  {month feb (1 1 64) (2 2 65.2) } }
{year 2000
	{ month feb (1 1 68 ) (2 3 66.66 ) ( 1 0 67.2)}
	{month dec (15 15 -9.2 ) (15 14 -8.8) (14 0 -2) }
}
